Incandescent-lamp burner.



A. A. J AHNKE.

INGANDESGBNT LAMP BURNER,

APPLICATION FILED KAY 2B. 1907.

Patented Nov. 2, 1909.

INVENTOR,

WITNESSES A TTORNE Y.

UNITED STATES PATENT oFFIoE.

ALBERT A. JAHNKE, OF SAN FRANCISCO, CALIFORNIA, ASSIGNOR, BY MESNEASSIGN- MENTS, TO INCANDESCENT OIL LAMP COMPANY, OF SAN FRANCISCO,CALIFORNIA, A CORPORATION OF ARIZONA TERRITORY.

INGANDESCENT-LAMP BURNER.

Specification of Letters Patent.

Patented Nov. 2, 1909.

To all whom it may concern:

Be it known that I, ALBERT A- JAHNKE, a citizen of the United States,residing at San Francisco, in the county of San Francisco and State ofCalifornia, have invented new and useful Improvements inIncandescent-Lamp Burners, of which the following is a specification.

The object of the present invention is to provide an improved burner forincandescent oil lamps, by means of which the air can be supplied moreevenly and to better advantage to the combustible gas generated from theoil.

In the accompanying drawing Figure 1 is a vertical section of aportionof a lamp equipped with my improved burner; Fig. 2 is a sectionon the line 22 of Fig. 1; Fig. 3is a top plan view of the generator;Fig. 4 is a horizontal section thereof; Fig. 5 is a horizontal sectionof the wick raiser; Fig. 6 is a section on the line 66 of Fig. 1; Fig. 7is a broken side view of the inner wall of the air chamber; Fig. 8 is adetail broken side view of the mantle post.

Referring to the drawing, 1 indicates the body of the lamp, a portiononly being here shown. Into the neck 2 of said body is screwed the outerwall 3 of the wick chamber, said wall being formed with an inwardlyextending shoulder 4. 5 indicates the inner wall of the wick chamber,and said outer and inner walls are formed with registering aperturesforming an air inlet 6 lead ing to the interior of the inner wall of thewick chamber which thus forms the wall of the central draft tube. Theedges of the apertures of the outer and inner tubes 3, 5, are connected,as shown at 8, so as to entirely inclose the wick within the wickchamber and prevent access thereto from the outer air. The wick used isa flat wick bent in the form of a cylinder, but with its vertical edgesseparated from each other, said edges passing on each side of the airinlet 6. Said edges pass into circular recesses 9 formed in the bottomplate 10 of the wick raiser, said plate being connected to a rack 11which is engaged by a pinion 12 on a stem 13 turned by means of a handle14. Connected to the inner edges of the recesses 9 is a cylindricalplate 15 which passes up with the wick through a guideway formed in ahorizontal partition 16, the latter partition extending across the innerwall of the wick chamber beneath said air inlet 6. From the center ofsaid partition rises a tube 17 in which reciprocates the rack 11 of thewick raiser. Upon this tube is placed the tube 18 of the generator,which carries the upper and lower spreaders 19, 20, the upper spreaderhaving the apertures 21 and the lower spreader having the apertures 22,somewhat larger than the apertures 21. The function of these spreadersis to deflect the air admitted to the inlet 6 and cause it to fullycommingle with the combustible vapor rising from the wick. The apertures21, 22 in said spreaders form an important service in breaking up thecurrent of air and preventing eddies, thus supplying the air uniformlyto said vapor.

The air chamber 24 is inclosed by a single 7 piece of sheet metal shapedto form an 1nner wall 25, having a shoulder 26 resting upon the shoulder4, and also an outer wall 27. The inner wall has at the top the outwardly extending flange 28 and the outer wall has the inwardly extendingflange 29 above the flange of the inner wall. Said inner wall is alsoformed near said flange with the apertures 30. These perforations 30form an important function in admitting air from the air chamber to thecombustible vapor rising from the wick, and dividing and evenlydistributing the air so admitted. The

outer wall is formed with circumferential beads 32, 33, and also formedwith beads registering with the beads 32, 33, is the combined chimneyholder and air screen 34, the upper portion being substantiallycylindrical, to retain therein the chimney, shown at 35, and havinginwardly extending feet 36, upon which said chimney rests, and the lowerportion curving inwardly and being formed with numerous perforations 37to admit air to the interior. The air so admitted passes up throughapertures 38 formed in the bottom of the air chamber and thus passesinto said chamber. Between the air screen and the neck ofthe lamp is theperforated base. ring 39 which conceals the bearing 40 of the stem ofthe wick raiser.

Secured within the chimney holder is a pocket 41, in which is receivedthe bottom of the mantle post 42, said post having its lower end bentback on itself to form a spring arm 43, which by sprinv pressure holdsthe post securely in the pocket. Suspended from said post is theinantle4:42. In conformance with the conical shape ofthe mantle the outer Wallof the air chamber is also made of a conical formfittimg; snugly withinthe lower end of the mantle.

In order to prevent turning the wick too high, there is secured to thestem a collar 47 having a finger 48 which moves between stops 49 formedin a disk 50 secured to the bearing for said stem.

In -order to prevent the lamp smoking, when being :carried by hand, Iprovide around the apertures 37 an air shutter 51, which can be turnedto vary the extent of opening for the admission of air, so that,

when necessary, the air can be shut off to prevent imperfect combustion.

The iOPGI'fltlOll of the device can now be readily understood. The airis supplied partly through theair inlet 6 and up through the centraldraft chamber, being deflected by the sp1'eaders-19, 20, and partlythrough the apertures 38 into the air chamber, whence itis supplied pastthe flange '28and through the apertures 30. I have found I that thisarrangement furnishes a uniform and even supply of air to thehydro-carbon vapor 'arisingfrom the wick. The flames/of combustion areuniformly 'distributed'within the interior of the mantle and passuniformly through said mantle, thus producing uniform incandescencethereof.

I claim In a lamp, the combination, with the outer wall of a wickchamber, of an inner wall of an air chamber, arranged ad acent to saidouter wall to form an airconduit, said inner wall extending into closeproximity with the top of the outer wall of the wick chamber, and beingformedclose tosaid top with small perforations to admit air into thespace between said walls, and an outer wallofthe air chamber having aninwardly extending flange to direct the air inward, substantially asdescribed.

In testimony whereof I have hereunto :set myhand .in the presenceof twosubscribing ALBERT A. JAHNKE.

witnesses.

